During a cell-mediated immune response, which of the following describes how infected cells are detected by the immune system? a
The infected cell's membrane shows some of the antigens of the invading pathogen.

b
The pathogen engulfs and destroys healthy cells, leaving antigens behind.

c
Antibodies bind with the pathogen's antigens, causing inflammation and swelling.

d
Memory B cells recognize the cell shape that results from infection by specific pathogens.

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations

The color of the fur is the genotypephenotype. the genetic combination of alleles that determine the fur color is called the genotypephenotype.